1Heat oven to 400°F. Grease bottoms only of 12 regular-size muffin cups with shortening or cooking spray (do not use paper baking cups).
2In large bowl, stir together flours, baking powder and salt; set aside. In medium bowl, beat milk, brown sugar, oil, orange peel and egg with fork or wire whisk until well mixed. Stir into flour mixture just until flour is moistened. Fold in dates. Divide batter evenly among muffin cups.
3Bake 18 to 22 minutes or until toothpick inserted in center comes out clean and tops begin to brown. Run knife around sides of muffins to loosen. Remove from pan to cooling rack. Serve warm.